Quick-release bench-vise



M. W. SMITH.

QUICK RELEASE BENCH VISE.

APPLICATION FILED MAY1.I920.

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f A1,391,913' PatntedSe t. 27 1921.y

Patented Sept. 27, 1921.

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UNITED STATES PATYE NT QFFICt,l

Memes Wieren es LYa-DHaaSTaHQDDESsOa ENGLAND f f QUICHELESE eBase-.vise

Speciativniof ittrs Rettet! l .Patented Sept. `-27., 192.1".

Appliation-fiiednay 7, 1920. seriaiireemnrz.' i 1 GRANTEnUNnEfR-THElavrslors or THE Aca MAME/.3,1 1921, l.11i-STM. L., 1313 Tov @Uw/tom#(may concern.. l

Beit known that I, MAURrcn WILLIAM SMITH, Aof Lyndhurst, Hoddesdon,` inthe county of Herts, England, a subject of the King of GreatBritainandlreland, have invented certain new n and useful Improve* nments in` or `Relating to` Quick- Release Bench-Visas, '(forrwhichl havefiledapplilcations in England vOctober 24, 1918, 130,511.7,.in FranceApril l, 1929, andin Belgium April 8, 1920,) of'which the following is aspecilication.

This inventonfrelates to `quick release bench vises, and comprises afixed jaw in which are mounted two half nuts, a movable jaw formedintegral with a double sliding bar sliding in the fixed jaw, a clampingscrew disposed between the two members of the double sliding bar, meansfor opening vise of this type.

and closing the half nuts from and into engagement with the clampingscrew and means for retaining' the half nuts in their closed position.

The object of this invention is to provide an improved form of quickrelease bench A quick release bench vise made in accordy ance with thisinvention' comprises two half nuts carrying pins working in inclinedslots in two sliding members, the said sliding members being adapted tomove simultaneously and in opposite directions. The inclined slots inthe sliding members `are formed for a portion of their length at one endparallel to the sliding face of the members to retain the halfl nuts inengagement with the screw.

Referring to the drawings filed herewith Figure l is an elevation of oneform of vise made in accordance with this invention; Fig. 2 is asectional planof the ixed Jaw; Fig. 3 is a cross section of the fixed)aw showing the half nuts engaging the clamping screw;

Fig. 4L is a cross section showing the half nuts clear of the clampingscrew.

The jaw a of the vise is adapted to be secured to a bench by'screws orbolts through the holes b b. Within a housing c in the jaw a aredisposed two half nuts d 0l. Each half nut is connected to a bar e e bya pin f f passing through inclined slots g g in the bars e e the bars ee working in Any force, therefore, tendingI toopen the Ytwo halfnuts.presses the pinsL f f onto these ,parallel pelis 921' y? and would :havenotendelicytofmove the-Sliding hars e e as. .would a vertical slot inthenuts. The slots g gf are provided with parallel or notched ends g2 g2 tolock the half nuts when inv positlon.

The slots .g g areparallel tokyone anothery i but inclined to the'sliding faceoffthe bars ce except at their endstg2 g2 where` they areparallel tothe sliding facejofvthe be V`the case if these slots wereinclined'for their whole length.

The movable jaw is provided with a double sliding bar j y', and betweenthe sliding bars is a clamping screw 7c adapted to be rotated by ahandle m. Below the lowersliding bar is a square shaft u onwhich ismounted a handleo anda two Varm lever p ,29" provided with slots r r.The lever p p is connected to the bars e e by ins s s which pass throughthe slots, the half nuts d d are adapted to engage the clamp-V ing screw7c, and are kept normally engaged with the screw by a coil spring t. When it is desired to move the loose jaw twithout the operation ofscrewing the handle, the squared shaft c is rotated by the handle oraising thekbar e and lowering the bar e, the pins f" traveling intheinclined slots g g throwing the half ynuts outof engagement with thescrew 7c so 4thatthe jaw can be movedforward or backward at will. On

'releasingy the handle o the half nuts imme- `said double sliding bar,said double sliding bar being adapted to slidein said fixed j aw, aclamping screw operating between said half nuts, means for opening andclosing y said half nuts,.- said means comprisingl vertical slots insaid half nuts, pinscarried by said half nuts, sliding members adaptedto move simultaneously and in opposite directions and to operate in saidvertical slots in said half nuts, inclined slots in said sliding membersadapted to coact with the said pins carried by said half nuts, a squareshaft disposed parallel with saidV double sliding bar, a two arm leveron said square shait, slots formed in said two arm'lever, pins on saidsliding members, Ycoacting with said `slots in the two arm lever, ahandle on said square shaft, and means for retaining the said half nutsin their closed position.`

2. A quick release vise comprising a fixed j aw adapted to be attachedtoa bench, two half nuts mounted in said fixed jaw, a 'double slidingbar, `a movable jaw carried by said double sliding bar, saiddoublesliding bar being adapted to slide inthe said tween said half nuts,means for opening and closing said half'nuts, said means comprisingvertical slots in l* said,y half nuts, pins carried by said half nuts,sliding members adapted to move simultaneously and in opin said vslidingmembers adapted to coact with the said pins carried by said half, nuts,aV square shaft disposed parallel with said double sliding -bar,'a twoarm lever on said square shaft, slots formed in said ytwo arm lever,pins on said sliding members,'coacting with said slots in the two armlever, a handle on said square shaft, and means for retaining thesaidhalf nuts in their closed position, said retainingV means characterizedin that the slots in said sliding members are formed parallel for vaportion of their length at one vend to the sliding faceso'fsaid slidingmembers, and a spring suitably disposed on saidV square shaft wherebytheVsliding members y fare retainedin thel'ocking position. Yiixedgavin'- aclamping screw operating be- "In testimonywhereof I have lsigned myAname to this specification.v q,

y MAURICE WILLIAMMSMITH,

